#include <iostream>
using namespace std;
int *tab, *tab2, K = 0;
long long int merge(int start_1, int koniec_1, int start_2, int koniec_2){
long long int inwersje = 0;
for(int i = start_1; i <= koniec_2; i++){
tab2[i] = tab[i];
}
int i = start_1;
int j = start_2;
int k = start_1;
int l = start_1;
while(i <= koniec_1 && j <= koniec_2){
while(tab2[l] + K >= tab2[j] && l <= koniec_1){
l++;
}
if(tab2[i] <= tab2[j]){
tab[k++] = tab2[j++];
inwersje += (koniec_1 - l + 1);
}else{
tab[k++] = tab2[i++];
}
}
while(i <= koniec_1){
tab[k++] = tab2[i++];
}
while(j <= koniec_2){
tab[k++] = tab2[j++];
}
return inwersje;
}
long long int merge_sort(int start, int koniec){
if(start < koniec){
int m = (start + koniec) / 2;
long long int a = merge_sort(start, m);
long long int b = merge_sort(m + 1, koniec);
long long int c = merge(start, m, m + 1, koniec);
return a + b + c;
}
return (long long int)(0);
}
int main(){
ios_base::sync_with_stdio(false);
int z;
cin >> z;
while(z--){
int n;
cin >> n >> K;
tab = new int[n + 1];
tab2 = new int[n + 1];
for(int i = 1; i <= n; i++){
cin >> tab[i];
}
cout << merge_sort(1, n) << endl;
delete [] tab;
delete [] tab2;
}
return 0;
}
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